Malicious PDF — malware analysis report

Static analysis result for SHA-256 13db0f3f60073b7f…

MALICIOUS

PDF

47.1 KB Created: 2020-10-25 10:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 4dd8a4c3533d866580a4e5e9381015eb SHA-1: df986291d4df6c5cd76aa09aeeb60910db40313f SHA-256: 13db0f3f60073b7f2bcbd593808cd6a01390d2697fa636d29047f340766040a7
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/aws?keyword=nationalism+in+india+class+10+notes+pdf+in+hindi In PDF document text
    • https://sakuvajavabese.weebly.com/uploads/1/3/1/3/131383602/43411.pdfIn PDF document text
    • https://nurekagenarufab.weebly.com/uploads/1/3/1/6/131636906/punedatotum-vodokubokex-lajifut-zonujasus.pdfIn PDF document text
    • https://kilesikawagex.weebly.com/uploads/1/3/4/3/134372597/966e73e6bb.pdfIn PDF document text
    • https://judiwufafa.weebly.com/uploads/1/3/3/9/133999980/3040289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8b6f9400019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5f8cb828d1e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f87a8850a31d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_5f87a961ed728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f884dc935c88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8882c441f29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f8bc3a7cd0ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8828d1a02f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007982.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007982.bin)
    • https://s3.amazonaws.com/bulozor/scholastic_dictionary_of_synonyms_antonyms_and_homonyms.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/34298152600.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/97981940911.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/kokifesovaline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c31f25-bc7d-4b4f-8db8-8b315e3686b0/share_market_basics_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0febe3-a49b-4085-99a6-b60537fda9dd/dragon_ball_z_shin_budokai_2_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2105dc20-fe3c-4979-9b6c-236b21f12c0f/36761249400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8307/0629/files/word_to_converter_online_high_resolution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5042/1410/files/dojudov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1437/9432/files/pig_heart_dissection_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00007982.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7982 5460 bytes
SHA-256: 192ce85f5337b7d1c23f6a8d4943c66b0941502b559a47c6b862926e5cf3583c
font_01_sfnt_off00008bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFD 10112 bytes
SHA-256: ce1d777f608d24507aa8965eee6ad3b4a8467540afb64f336517e3cc11f50c83